Sounds that make me feel all warm and fuzzy...

Jet plane engines spooling up for takeoff and thrust reversers deploying upon landing
Every time I fly, I look forward to hearing and feeling these acoustic vibrations that give a sense of power to the flying experience, as well as show the engineered beauty of these flying metal birds. This is particularly poignant in DC9s and the larger Boeing aircraft. Here are two examples: http://www.youtube.com/watch?v=LZ1mrFy_KgA&feature=related (start at 3:10) and http://www.youtube.com/watch?v=IPc3oYMiDfI

Ice hockey players running into the boards
When hockey players run into the boards, either tussling with other players looking for the puck or getting hit into the boards, I strain my ears for the bowling alley sound. You know, the one where the pins are knocked down by the bowling ball and clatter on the polished wooden panels of the alley.

Birds chirping in the mornings
I usually wake up early on weekday mornings, just an hour or so after the sun has come up. Accompanying the sunlight filtering through my windows is the playful whistling of the cardinal and blue jay that like to perch on the branches of the big tree outside my room. This always puts me in a good mood. That and the squirrel running up the tree, looking for his acorn collection.

Roar of the waves, alternating with the water lapping on the shores
It's been a while since I have heard either sound, but it always makes me appreciate the power and beautiful tranquility of nature.